/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 导航容器 */
.nav-container {
    background: #2c3e50;
    padding: 0 10%;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

/* 一级导航 */
.main-nav {
    display: flex;
    list-style: none;
    position: relative;
}

.nav-item {
    position: relative;
    padding: 15px 25px;
    transition: background 0.3s;
}

.nav-item > a {
    color: #ecf0f1;
    text-decoration: none;
    font-size: 16px;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background: #f5f5f5;
    color: #222;
}
.cover {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background: linear-gradient(120deg, #fbeee6 0%, #e0c3fc 100%);
}
.cover h1 {
    font-size: 3em;
    margin-bottom: 0.5em;
}
.cover p {
    font-size: 1.2em;
    margin: 0.2em 0;
}
.cover button {
    margin-top: 2em;
    padding: 0.8em 2em;
    font-size: 1.2em;
    background: #8ec5fc;
    border: none;
    border-radius: 8px;
    color: #fff;
    cursor: pointer;
    transition: background 0.3s;
}
.cover button:hover {
    background: #6e8efb;
}
.page {
    max-width: 800px;
    margin: 0 auto;
    padding: 2em 1em;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    margin-top: 2em;
}
@media (max-width: 600px) {
    .cover h1 {
        font-size: 2em;
    }
    .page {
        padding: 1em 0.5em;
    }
}